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In What Ways Do I Need To Consider The Impact Of Human Activities On The Operation Of An E/E/PE Safety-Related System?

IEC 61508 requires human factor issues to be considered in the determination of hazards and hazardous events ( of IEC 61508-1) and in the design of the E/E/PE safety-related system ( of IEC 61508-2). For E/E/PE safety-related protection systems, there are three principal areas that need to be considered:
  • human actions or errors that can place a demand on the E/E/PE safety-related protection system – these need to be identified and quantified;
  • human failure to respond effectively to alarms or take other actions that would otherwise reduce the demand on the E/E/PE safety-related protection system;
  • human failure in testing and maintenance of the E/E/PE safety-related protection system, reducing its effectiveness and increasing the probability of failure on demand.
This text contains extracts from the IEC Functional Safety Zone. All such extracts are copyright of International Electrotechnical Commission © 2005, IEC, Geneva, Switzerland. All rights reserved. IEC has no responsibility for the placement and context in which the extracts are reproduced. This notice takes precedence over any general copyright statement.



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Created 2008-11-11
Modified 2016-05-13
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